摘要
用化学气相沉积（ＣＶＤ）法制备的巴基管作为锂离子电池的负极活性物质可以达到７００ｍＡｈ／ｇ的容量，远超过了石墨嵌锂化合物理论容量（３７２ｍＡｈ／ｇ）．ＣＶＤ巴基管电极经２０次充放电循环后，放电容量保持率为６５．３％．尽管ＣＶＤ巴基管电极初次充放电效率低（４２．６％），但经表面镀铜修饰后，初次充放电效率可提高到５５．９％．
Carbon nanotubes were produced by chemical vapour deposition(CVD) of acetylene under hydrogen gas.The reversible specific capacity of carbon nanotubes is up to 700 mAh/g, much higher than the theoretical specific capacity of graphite(372 mAh/g).After twenty charge/discharge cycles,the discharge capacity of carbon nanotube anode still maintains 65.3% of its original discharge capacity . Besides, the charge/discharge efficiency of carbon nanotube in the first charge/discharge cycle was found to improve from 42.6% up to 55.9% by coating carbon nanotubes with copper.
出处
《电化学》
CAS
CSCD
1998年第3期313-317,共5页
Journal of Electrochemistry
基金
国家自然科学基金
